MTT Agrifood Research Finland, FI-31600 Jokioinen, Finland.
J Phys Condens Matter. 2011 May 11;23(18):184106. doi: 10.1088/0953-8984/23/18/184106. Epub 2011 Apr 20.
On microstructured hydrophobic surfaces, geometrical patterns may lead to the appearance of a superhydrophobic state, where gas bubbles at the surface can have a strong impact on the fluid flow along such surfaces. In particular, they can strongly influence a detected slip at the surface. We present two-phase lattice Boltzmann simulations of a flow over structured surfaces with attached gas bubbles and demonstrate how the detected slip depends on the pattern geometry, the bulk pressure, or the shear rate. Since a large slip leads to reduced friction, our results give assistance in the optimization of microchannel flows for large throughput.
在微结构化疏水面上，几何图案可能导致出现超疏水性状态，其中表面上的气泡会对沿此类表面的流体流动产生强烈影响。 特别是，它们可以强烈影响表面的检测滑移。 我们对带有附着气泡的结构化表面上的两相格子玻尔兹曼模拟进行了演示，并展示了检测到的滑移如何取决于图案几何形状、体压或剪切率。 由于较大的滑移会导致摩擦力减小，因此我们的结果有助于优化微通道流量以实现大吞吐量。
